Automotive brake



$3. 5. DMVN AUTOMOTIVE BRAKE Filed March. 11, 1925i uw nimma@ L A funn Patented Feb. 2, 1926.

ireojsrar HOUSE AIR BRAKE COMPANY, TXON OIF IPENNSYL JANIA.

l? W'V-IIJMERDNG, PENNSYLVANIA, ll. lLRPOltlA AUTOMTIVE Application filed March 1l, 1924. Serial No. Gsbe.

To all whom it may concer/n.'

Be it known that I, SmNEreGK. DOWN, a citizen of the United States, residing at Pittsburgh, in the county of Alleghen and 5 State of Pennsylvania, have invente neu and useful Improvements in Automotive Brakes, of which the following is a specification.

This invention relates to vehicle brakes,

10 and more particularly to a fluid pressure operated front wheel brake.

The principal object of my invention is .to providean improved fluid pressure front wheel vehicle brake.

In 'the accompanying drawing; Fig. l is a side elevation of a front Wheel brakegneelnanism embodying my invention; and Fig. 2 a central sectional view of the construction shown in Fig. 1. v

As shown in the drawing, the reference numeral l indicates a front Wheelof a motor vehicle, which is carried by` the usual steering knuckle 2, said knuckle being mounted on the usual front axle 3.

Secured to the Wheel l is a brake drum l having an internal friction face 5 and mounted in said drum are brake heads 6, each provided with a brake shoe 7 adapted to engage the friction face -of the drum 4.

Mounted intermediate the free ends of the brake heads f3 is a brake chamber compriringr a flanged casing! section 8, a flanged cover section 9, and a flexible diaphragm 10, which is secured between the fianges of the casingr section and the cover section. A pipe ll is connected to the chamber at one side of the diaphragm lO and fluid under pressure is supplied to and released from said diaphragm through said pipe.

40 A pressure plate l2 engages the opposite side ot' diaphragm l() and secured to said plate is a push rod 13. A lug 14 is provided at each of the free ends of the brake heads 6 and pivotally connected toeaoh lug is a link 15. The opposite ends of said links are ivotally connected to a crosshead 16, seeureld to the end of the push rod 13.

The inner portions of the free 'ends of the y brake heads 6 are extended toward each u .L n v shoes with the tridtion :Eacmo of the brake porting means for the brake chamber 'isdisu pensed with.

lVhen Huid under pressure is supplied through pipe l1 to the flexible diaphragm fi' 10, said diaphragm is operated to cause an outer` movement of the push rod lil. '.lla` links .l5 are then actuated by said push rod to spread the ends ofthe brake heads f5 and thus cause the eniragement oli' the brake o drum a.

Upon releasing iiuid under pressure from the diaphragm l0, the coil springs 18 and E) will act to effect the release movement of the brake lieads and the connected-ila., a; f so as to release the brakes. A N means of the above described construe` tionflhe fluid pressure brake chamber is envtirely disposed Within thebrake' drum and the brake heads are utilized as the sugiiport` ing means for the brake chamber.

Having now described in v invention, what l claim as new and desire to secure by: Let ters Patent, is

l. ln a vehicle brake, the i-lmibination with a brake drum and brake heads mounted in said drum and having the Yl'ree ends of the bral-:e heads extended. of a brake chamber mounted on the extended ends ol' said brake heads,'a nu 'able abutment in Said chamber, and a push rod operable by said abutment and operatively connected to the fre@ ends ot said brake heads.

2. ln a vehicle brake. the con'ibination With a brake drum and brake heads mounted in said drum, ofi a brake chamber, a movable abutment in said chamber, and a push rod operable by said abutment and opera tively connected to the free ends of said brake heads, the free ends of the brake heads being provided with inwardlyy extending portions forming a support vfor said brake chamber.

In testimony whereof I have hereunto set my hand.

SIDNEY e. DOWN. 

